Department of Physics, Anna University (MIT campus), Chrompet, Chennai 600 044, India; Department of Physics, Meenakshi Sundararajan Engineering College, Chennai 600 024, India.
Department of Physics, Anna University (MIT campus), Chrompet, Chennai 600 044, India.
Mar Pollut Bull. 2018 Feb;127:377-386. doi: 10.1016/j.marpolbul.2017.11.026. Epub 2017 Dec 21.
Natural radioactivity content and heavy metal concentration in the intertidal zone sand samples from the southern region of Tamil Nadu coast, India, have been analyzed using gamma ray spectrometer and ICP-OES, respectively. From gamma spectral analysis, the average radioactivity contents of U, Th, and K in the intertidal zone sand samples are 12.13±4.21, 59.03±4.26, and 197.03±26.24Bq/kg, respectively. The average radioactivity content of Th alone is higher than the world average value. From the heavy metal analysis, the average Cd, Cr, Cu, Ni, Pb, and Zn concentrations are 3.1, 80.24, 82.84, 23.66, 91.67, and 137.07ppm, respectively. The average Cr and Ni concentrations are lower, whereas other four metal (Cd, Cu, Pb, and Zn) concentrations are higher than world surface rock average values. From pollution assessment parameter values, the pollution level is "uncontaminated to moderately contaminated" in the study area.
利用伽马射线能谱仪和电感耦合等离子体发射光谱仪（ICP-OES）分别分析了印度泰米尔纳德邦南部沿海潮间带沙滩样品中的天然放射性核素含量和重金属浓度。从伽马能谱分析可知，潮间带沙滩样品中 U、Th 和 K 的平均放射性活度分别为 12.13±4.21、59.03±4.26 和 197.03±26.24Bq/kg。仅 Th 的平均放射性活度就高于世界平均值。从重金属分析可知，Cd、Cr、Cu、Ni、Pb 和 Zn 的平均浓度分别为 3.1、80.24、82.84、23.66、91.67 和 137.07ppm。Cr 和 Ni 的平均浓度较低，而其他四种金属（Cd、Cu、Pb 和 Zn）的浓度均高于世界表岩平均值。根据污染评估参数值，研究区域的污染水平为“无污染到中度污染”。
